At the end of a normal expiration when outward air flow has ceased,
A) intra-alveolar pressure is less than atmospheric pressure.
B) intra-alveolar pressure is greater than atmospheric pressure.
C) intra-alveolar pressure is equal to atmospheric pressure.
D) intrapleural pressure is greater than atmospheric pressure.
E) intrapleural pressure is greater than intra-alveolar pressure.

Question

Quizplus · Accepted Answer

During a normal expiration, when the outward air flow has ceased, the intra-alveolar pressure becomes equal to atmospheric pressure, allowing the lungs to maintain a stable volume.

At the End of a Normal Expiration When Outward Air